180842111 has 2 divisors, whose sum is σ = 180842112. Its totient is φ = 180842110.

The previous prime is 180842087. The next prime is 180842113. The reversal of 180842111 is 111248081.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-180842111 is a prime.

It is a super-2 number, since 2×180842111² = 65407738221872642, which contains 22 as substring.

Together with 180842113, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (180842113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90421055 + 90421056.

It is an arithmetic number, because the mean of its divisors is an integer number (90421056).

Almost surely, 2^180842111 is an apocalyptic number.

180842111 is a deficient number, since it is larger than the sum of its proper divisors (1).

180842111 is an equidigital number, since it uses as much as digits as its factorization.

180842111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 26.

The square root of 180842111 is about 13447.7548683786. The cubic root of 180842111 is about 565.5007553118.

The spelling of 180842111 in words is "one hundred eighty million, eight hundred forty-two thousand, one hundred eleven".